Print DPI calculator for images
Enter the image pixels and the print size you want to see the resolution it will print at before you send it off.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter image width, image height, print width, print height and print size unit.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Horizontal DPI = pixel width ÷ print width in inches, vertical likewise. Effective DPI is the lower of the two.
Example
Inputs: Image width = 3,000 px, Image height = 2,400 px, Print width = 10, Print height = 8, Print size unit = Inches. Result: Effective DPI: 300 DPI; Horizontal DPI: 300 DPI; Vertical DPI: 300 DPI.
Limits and caveats
- The 300, 200 and 150 thresholds are common print guidelines, not a binding standard; large banners seen from afar accept less.
- If horizontal and vertical DPI differ, the image will be stretched or cropped to fit.
Questions about this tool
Is 150 DPI enough to print?
Often yes for large posters viewed from a distance; photos and brochures look better at 300 DPI.
Why are there two DPI values?
The image ratio may differ from the paper ratio, and the lower value sets how sharp the print looks.
Does raising DPI in my editor help?
Changing the number without adding real pixels does not add sharpness; it only shrinks the print size.